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现行 ISO 2528:2017
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Sheet materials — Determination of water vapour transmission rate (WVTR) — Gravimetric (dish) method 片材 - 水蒸汽透过率的测定 - 重量(盘)法
发布日期: 2017-10-13
ISO 2528:2017规定了一种确定板材水蒸气透过率(通常被错误地称为“渗透性”)的方法。 如果预计传输速率小于1 g/m2/天,或者对于厚度大于3 mm的材料,通常不建议使用这种方法。在这种情况下,ISO 9932中规定的方法是优选的。 该方法不能应用于被热蜡损坏或在所用测试条件下收缩到可感知程度的薄膜材料。 出于某些目的,可能需要确定折痕材料的透射率;附录A给出了这方面的程序。
ISO 2528:2017 specifies a method for the determination of the water vapour transmission rate (often erroneously called "permeability") of sheet materials. This method is not generally recommended for use if the transmission rate is expected to be less than 1 g/m2 per day or for materials thicker than 3 mm. In such cases the method specified in ISO 9932 is preferred. The method cannot be applied to film materials that are damaged by hot wax or that shrink to an appreciable extent under the test conditions used. For some purposes it may be necessary to determine the transmission rate of creased material; a procedure for this is given in Annex A.
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归口单位: ISO/TC 6/SC 2
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